Stove and range construction.



J. P. McDONOUGH. STOVE AND BANG-E CONSTRUCTION.

APPL IOATIQN FILED APR- 8. 1910.

Patented Nov. 29, 1910;

WITNESSES: A WQ I Tu TTORNEY.

UNTE TATES ATE JOHN P. MODONOUGH, OF ST. LOUIS, MISSOURI, ASSIGNOR 0FONE-HALF TO L. A. RAGAN, OF ST. LOUIS, MISSOURI.

STOVE AND RANGE CONSTRUCTION.

strait.

Specification of Letters Patent.

Application filed April 8, 1910.

Patented Nov. 29, 1910.

Serial No. 554,196.

To all whom it "may concern:

Be it known that 1, JOHN P. McDon- OL'GH, a citizen of the UnitedStates, residing at St. Louis, State of Missouri, have invented certainnew and useful Improvements in Stove and Range Constructions, of whichthe following is a full, clear, and exact description, reference beinghad to the acgompgnying drawings, forming a part neieoi.

My invention has relation to improvements in stove and rangeconstructions; and it consists in the novel details more fully set forthin the specification and pointed out in the claim.

In the drawings, Figure 1 is a side elevation of a conventional stove orhouse range, the wall of the stove being removed to show the interior,and the parts being shown in section along the plane of removal of saidwall, the said figure showing my invention applied to said stove; andFig. 2 is a horizontal section taken below the stove-top on the line 2-2of Fig. l.

The object of my invention is to substitute for the grate and ash-sifterin the prevailing forms of heating and cooking stoves and ranges, anupper burning water-tube grate and a lower burning grate, both beinglocated in the same fire-box compartment, the ends of the water-tubesterminating in headers (either in the form of boxes as shown, or theirequivalents) exposed to the heat of the combustion products, the lowergrate intercepting whatever fuel drops from the upper grate and notpreviously consumed thereon.

it further object is to so dispose the grate surfaces as to cause thedraft to pass from the compartment above the upper grate through saidupper grate and into the compartment between thegrates, the draft fromthe lower-burning grate being upward and rearward whereby the productsultimately pass into and through the stove fines into the exit fine inthe usual way.

A further object is to effect perfect combustion of the fuel, producingpractically no smoke, insuring cleanliness and a high heatingefficiency.

The water-tube grate and its respective headers are in circuitwith awater-tank, the contents of which is kept heated by the circulation ofthe water between it and the headers and tubes, so that a constantsupply of hot water may always be on hand.

The advantages of the invention will be best apparent from a detaileddescription thereof, which is as follows:Referring to the drawings, Srepresents a conventional form of stove or range (though the inventionis applicable to any form of heating furnace), in which the tire-box isrepresented by F, and the ash-receptacle by A. Separating theash-receptacle from the fire-box is an ordinary upward burning grate Gto which atmospheric air may be admitted through the valve-controlledopenings of doors D, D. Above the door D is a front header 1 which isconnected by means of the upwardly and rearwardly inclined watertubes 2to an inner header 1 located within the fire-box and spaced from therear wall thereof as shown. Tapping the upper portion of the innerheader 1 is a circulating pipe a which discharges into the upper end ofa hot-water tank '1 placed adjacent to, and extending above the stove,the return from the tank entering the upper portion of the header 1through the circulating or return pipe a. Sections of these pipes a, a,are disposed alongside the stove and below the stove-top, thereby beingout of the way and not interfering with the movements of the personworking about the'stove. Access to the water-tubes 2 which form theupper and main grate for the fuel may be had through a door D placedbetween the stovetop and the header 1, air being admitted into the spaceabove the water-grate through valve-controlled openings of said door Das well understood in the art. The stove is provided with adamper-controlled exit fine E to which lead the usual stove fines orpassages f as well understood, no description of these being necessary.

)Vhatever fuel is not consumed on the upper grate formed by thewater-tubes 2 will drop onto the lower grate G and there be thoroughlyconsumed. As seen from the arrows in Fig. 1, the upper grate, whichclivides the fire-box into two superposed intercominunioatingcompartments (one above the upper grate, and the other between thegrates) is a downward burning grate, whereas the bottom grate G is anupward burning grate. The air drawn through the upper grate carries withit unconsumed products of combustion, and as these must not only passthrough the incandescent carbon on the upper grate, but mustmix more orless with air and the combustion products passing upward and rearwardfrom the bottom grate G, it follows that all the products will bepractically consumed and no smoke result. So that we not only have astove which completely burns all available carbon and other combustibleelements of the fuel, but serves to heat a maximum quantity of water tobe used for domestic or other purposes. Owing to the completeconsumption of the fuel, a minimum quantity of ash will result, no smokeor soot will deposit in the stove tines, and a clean fire is at alltimes assured. The invention is not limited to any special designotstove, range or turnace.

Having described my invention, what I claim is In combination with astove having a bottom ash receptacle and a fire-box between saidreceptacle and stove top, a bottom grate se )arating the lire-box fromthe ash receptacle, a rearwardly and upwardly inclined water-tube gratemounted across the firebox a suitable distance above the bottom grateand dividing the fire-box into two superposed sections, an outer headerforming a wall for the upper firebox section and discharging into thebottoms of the watertubes, an inner header engaging the stovetop andforming a tight joint therewith and spaced a suitable distance from therear wall of the fire-box and from the bottom grate and receiving thedischarges from the inner upper ends of the Water-tubes, a watertanklocated outside, and extending above, the stove, circulating pipesleading from the upper portions of the respective headers andcommunicating with the top and bottom of the water-tank, doors above andbelow the outer header leading to the respective fire-box sectionsopposite thereto, an exit flue, and fines in the stove connecting saidline with the rear of the fire-box.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN P. McDONOUGl-l.

lVitnesses EMIL STAREK, Jos. A. MICHEL.

